Kemono: retry when fetching posts (#958)

* Kemono: retry when fetching posts

* stricter rate limit

multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/kemono/Kemono.kt

@@ -37,7 +37,7 @@ open class Kemono(
 ) : HttpSource(), ConfigurableSource {
     override val supportsLatest = true
 
-    override val client = network.client.newBuilder().rateLimit(2).build()
+    override val client = network.client.newBuilder().rateLimit(1).build()
 
     override fun headersBuilder() = super.headersBuilder()
         .add("Referer", "$baseUrl/")
@@ -163,7 +163,7 @@ open class Kemono(
         val result = ArrayList<SChapter>()
         while (offset < maxPosts && hasNextPage) {
             val request = GET("$baseUrl/$apiPath${manga.url}?limit=$POST_PAGE_SIZE&o=$offset", headers)
-            val page: List<KemonoPostDto> = client.newCall(request).execute().parseAs()
+            val page: List<KemonoPostDto> = retry(request).parseAs()
             page.forEach { post -> if (post.images.isNotEmpty()) result.add(post.toSChapter()) }
             offset += POST_PAGE_SIZE
             hasNextPage = page.size == POST_PAGE_SIZE
@@ -171,6 +171,17 @@ open class Kemono(
         result
     }
 
+    private fun retry(request: Request): Response {
+        var code = 0
+        repeat(3) {
+            val response = client.newCall(request).execute()
+            if (response.isSuccessful) return response
+            response.close()
+            code = response.code
+        }
+        throw Exception("HTTP error $code")
+    }
+
     override fun chapterListParse(response: Response) = throw UnsupportedOperationException()
 
     override fun pageListRequest(chapter: SChapter): Request =

multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/kemono/KemonoGenerator.kt

@@ -9,7 +9,7 @@ class KemonoGenerator : ThemeSourceGenerator {
 
     override val themePkg = "kemono"
 
-    override val baseVersionCode = 9
+    override val baseVersionCode = 10
 
     override val sources = listOf(
         SingleLang("Kemono", "https://kemono.su", "all", isNsfw = true),